.loginbox {
    box-shadow: rgba(0, 0, 0, 0.15) 0px 15px 25px, rgba(0, 0, 0, 0.05) 0px 5px 10px;
    padding: 80px 200px 40px 40px;
    position: absolute;
    top: 25%;
    left: 34%;
    border-radius: 10px;
    background-color: #fff;
    opacity: 95%;
}
.bigbanner{
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background:  url("https://z1.muscache.cn/im/pictures/miso/Hosting-52539316/original/2ee67be1-6f5d-4cce-839d-1eabae38a8b7.jpeg?im_w=1440") no-repeat;
    background-size: cover;
   
}
.titlebox{
    position: absolute;
    top: 25px;
    left: 160px;
}